目录
前提
实例
前提NetworkManager 需要开启
查看NetworkManager 状态
systemctl status NetworkManager
开启NetworkManager
systemctl startNetworkManager
实例
查看网卡信息
nmcli
查看网络设备状态
nmcli device status
查看网络连接状态
nmcli connection
查看UUID等网卡信息
nmcli connection show
查看网络详细信息
nmcli device show ens32
设置静态ip
nmcli connection modify ens32 ipv4.addresses '192.168.1.10'
设置网关
nmcli connection modify ens32 ipv4.gateway '192.168.1.1'
设置DNS
nmcli connection modifly ens32 ipv4.dns '144.144.144.144'
ip地址设为手动
nmcli connection modify ens32 ipv4.method manual
ip地址设为自动获取
nmcli connection modify ens32 ipv4.method auto
设置开机自动连接
nmcli connection modify ens32 connection.autoconnect yes
nmcli connection modify ens32 connection.autoconnect no
重新加载配置文件
nmcli connection reload
不重启系统网卡生效
nmcli connection up ens32
nmcli device connect ens32
nmcli device reapply ens32
查看DNS
cat /etc/resolv.conf
插曲
prefix 子网掩码
255.255.255.0用二进制表示为11111111.11111111.11111111.00000000, 24个1。所以说网络位是24位。PREFIX=24
255.255.255.192用二进制表示为11111111.11111111.11111111.11000000, 26个1。所以说网络位是26位。PREFIX=26
255.255.255.128用二进制表示为11111111.11111111.11111111.10000000, 26个1。所以说网络位是25位。PREFIX=25
255.255.255.224用二进制表示为11111111.11111111.11111111.11100000, 27个1。所以说网络位是27位。PREFIX=27
255.255.255.240用二进制表示为11111111.11111111.11111111.11110000, 28个1。所以说网络位是28位。PREFIX=28
255.255.255.248用二进制表示为11111111.11111111.11111111.11111000, 29个1。所以说网络位是29位。PREFIX=29
笔者配置文件中最后有一行 prefix = 32 ，无论如何设置子网掩码netlmask 都是255.255.255.255，删除后才恢复
nmcli的命令参数
[root@localhost ~]# nmcli --help
Usage: nmcli [OPTIONS] OBJECT { COMMAND | help }
OPTIONS
-t[erse] terse output
-p[retty] pretty output
-m[ode] tabular|multiline output mode
-f[ields] <field1,field2,...>|all|common specify fields to output
-e[scape] yes|no escape columns separators in values
-n[ocheck] don't check nmcli and NetworkManager versions
-a[sk] ask for missing parameters
-w[ait] <seconds> set timeout waiting for finishing operations
-v[ersion] show program version
-h[elp] print this help
OBJECT
g[eneral] NetworkManager's general status and operations
n[etworking] overall networking control
r[adio] NetworkManager radio switches
c[onnection] NetworkManager's connections
d[evice] devices managed by NetworkManager
添加网卡到配置文件
添加网卡到配置文件，并且命名为eth1
[root@localhost ~]# nmcli connection add ifname eno33554992 con-name eth1 type ethernet
Connection 'eth1' (5f1fde10-d2a2-4ea5-8213-7cdb53bb59bf) successfully added.
[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state
UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UP qlen 1000
link/ether 00:0c:29:4d:bb:53 brd ff:ff:ff:ff:ff:ff
inet 192.168.10.10/24 brd 192.168.10.255 scope global
eno16777736
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4d:bb53/64 scope link
valid_lft forever preferred_lft forever
3: eno33554992: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdiscpfifo_fast state UP qlen 1000
link/ether 00:0c:29:4d:bb:5d brd ff:ff:ff:ff:ff:ff
inet6 fe80::20c:29ff:fe4d:bb5d/64 scope link
valid_lft forever preferred_lft forever
修改网络配置文件添加MAC地址 (eno33554992) 、修改BOOTPROTO=static 修改设备名DEVICE=eth1
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth1
TYPE=Ethernet
BOOTPROTO=static
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=eth1
UUID=5f1fde10-d2a2-4ea5-8213-7cdb53bb59bf
DEVICE=eth1
ONBOOT=yes
HWADDR=00:0c:29:4d:bb:5d
重启network服务之后 查看ip
[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state
UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UP qlen 1000
link/ether 00:0c:29:4d:bb:53 brd ff:ff:ff:ff:ff:ff
inet 192.168.10.10/24 brd 192.168.10.255 scope global
eno16777736
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4d:bb53/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdiscpfifo_fast state UP qlen 1000
link/ether 00:0c:29:4d:bb:5d brd ff:ff:ff:ff:ff:ff
添加ip地址
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth1
TYPE=Ethernet
BOOTPROTO=static
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
NAME=eth1
UUID=5f1fde10-d2a2-4ea5-8213-7cdb53bb59bf
DEVICE=eth1
ONBOOT=yes
HWADDR=00:0c:29:4d:bb:5d
IPADDR0=192.168.1.101
PREFIX0=24
GATEWAY=192.168.1.254
重启网络服务并且查看ip
[root@localhost ~]# systemctl restart network
[root@localhost ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state
UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UP qlen 1000
link/ether 00:0c:29:4d:bb:53 brd ff:ff:ff:ff:ff:ff
inet 192.168.10.10/24 brd 192.168.10.255 scope global
eno16777736
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4d:bb53/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UP qlen 1000
link/ether 00:0c:29:4d:bb:5d brd ff:ff:ff:ff:ff:ff
inet 192.168.1.101/24 brd 192.168.1.255 scope global eth1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4d:bb5d/64 scope link
valid_lft forever preferred_lft forever
[root@localhost ~]# nmcli connection show
NAME UUID TYPE DEVICE
eth1 5f1fde10-d2a2-4ea5-8213-7cdb53bb59bf 802-3-ethernet eth1
eno16777736 ce1a55de-9427-4f08-9ff8-256ac08ebd78 802-3-ethernet eno16777736
Linux系统怎么查看网卡的UUID
在linux系统下查看网卡的UUID需要nmcli命令，但是该命令系统没有提供。
1、首先要查看哪个软件包提供了该命令
[root@tpp ~]# yum provides "*/nmcli"
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.pubyun.com
* extras: ftp.sjtu.edu.cn
* updates: mirrors.pubyun.com
base/filelists_db | 5.2 MB 00:04
extras/filelists_db | 30 kB 00:00
updates/filelists_db | 829 kB 00:00
1:NetworkManager-0.8.1-99.el6.i686 : Network connection manager and user
: applications
Repo : base
Matched from:
Filename : /usr/bin/nmcli
2、由上面的查看结果，我们知道是NetworkManager，下面我们先安装这个软件包
[root@tpp ~]# yum install -y NetworkManager
3、然后启动服务
[root@tpp ~]# service NetworkManager start
4、查看网卡的UUID
[root@tpp ~]# nmcli con
名称 UUID 类型 范围 真实时间戳
System eth0 d9a980b8-b4bd-4573-b966-77e0fcdd6205 802-3-ethernet 系统 2015年08月29日 星期六 22时07分43秒
